Time standards are set by Illinois Swimming Inc. (ISI), USA Swimming and the YMCA state and local committees. The standards are provided for various ages, male/female and various pool sizes. The pool sizes include short course yards or SCY (25 yds, typical for indoor meets), short course meters or SCM (25 meters, some indoor meets) & long course meters or LCM (50 meters, typical outdoor meets).
YMCA Time Standards: Swimmers, and Relays, may qualify for the YMCA District, State and National Championships at any YMCA approved meet throughout the Short course season,but include the previous year' Championship meet.
USA Swimming Time Standards
Illinois Swimming Time Standards: A swimmer may achieve a qualifying time at any USA sanctioned or approved meet. These are for Illinois Swimming championship meets.
USA National / Motivational Times: These times are used at various meets for qualifying times or designation for awards. The AAA time standard is the Zone qualifying time for Senior and Age Group swimming under the USA-S National Governing Body.